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/*
* Copyright (C) 2010 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ResponsivenessTimer.h"
#include "WorkItem.h"
namespace WebKit {
static const double kResponsivenessTimeout = 3;
ResponsivenessTimer::ResponsivenessTimer(ResponsivenessTimer::Client* client)
: m_client(client)
, m_isResponsive(true)
, m_timer(RunLoop::main(), this, &ResponsivenessTimer::timerFired)
{
}
ResponsivenessTimer::~ResponsivenessTimer()
{
m_timer.stop();
}
void ResponsivenessTimer::invalidate()
{
m_timer.stop();
}
void ResponsivenessTimer::timerFired()
{
// We'll never schedule the timer unless we're responsive.
ASSERT(m_isResponsive);
m_isResponsive = false;
m_client->didBecomeUnresponsive(this);
m_timer.stop();
}
void ResponsivenessTimer::start()
{
if (m_timer.isActive())
return;
if (!m_isResponsive)
return;
m_timer.startOneShot(kResponsivenessTimeout);
}
void ResponsivenessTimer::stop()
{
if (!m_isResponsive) {
// We got a life sign from the web process!
m_client->didBecomeResponsive(this);
m_isResponsive = true;
}
m_timer.stop();
}
} // namespace WebKit
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